I had a SB600 from Nikon I tried to use with my Sony a6000 or Olympus Pl2. Whatever i did, the flash was too bright. I had no problem using the Neewer TT560. I bought two of these and set them up as slaves to the built in flash. Light is light so what isn't to like. I am very pleased with th equality of the construction. These units are very well bult for the money.